kernel/drivers/gpu/drm/exynos/exynos_drm_core.c

   1 /* exynos_drm_core.c
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  * Author:
   5  *      Inki Dae <inki.dae@samsung.com>
   6  *      Joonyoung Shim <jy0922.shim@samsung.com>
   7  *      Seung-Woo Kim <sw0312.kim@samsung.com>
   8  *
   9  * This program is free software; you can redistribute  it and/or modify it
  10  * under  the terms of  the GNU General  Public License as published by the
  11  * Free Software Foundation;  either version 2 of the  License, or (at your
  12  * option) any later version.
  13  */
  14
  15 #include <drm/drmP.h>
  16 #include "exynos_drm_drv.h"
  17 #include "exynos_drm_crtc.h"
  18 #include "exynos_drm_encoder.h"
  19 #include "exynos_drm_fbdev.h"
  20
  21 static LIST_HEAD(exynos_drm_subdrv_list);
  22
  23 int exynos_drm_create_enc_conn(struct drm_device *dev,
  24                                         struct exynos_drm_display *display)
  25 {
  26         struct drm_encoder *encoder;
  27         int ret;
  28         unsigned long possible_crtcs = 0;
  29
  30         ret = exynos_drm_crtc_get_pipe_from_type(dev, display->type);
  31         if (ret < 0)
  32                 return ret;
  33
  34         possible_crtcs |= 1 << ret;
  35
  36         /* create and initialize a encoder for this sub driver. */
  37         encoder = exynos_drm_encoder_create(dev, display, possible_crtcs);
  38         if (!encoder) {
  39                 DRM_ERROR("failed to create encoder\n");
  40                 return -EFAULT;
  41         }
  42
  43         display->encoder = encoder;
  44
  45         ret = display->ops->create_connector(display, encoder);
  46         if (ret) {
  47                 DRM_ERROR("failed to create connector ret = %d\n", ret);
  48                 goto err_destroy_encoder;
  49         }
  50
  51         return 0;
  52
  53 err_destroy_encoder:
  54         encoder->funcs->destroy(encoder);
  55         return ret;
  56 }
  57
  58 int exynos_drm_subdrv_register(struct exynos_drm_subdrv *subdrv)
  59 {
  60         if (!subdrv)
  61                 return -EINVAL;
  62
  63         list_add_tail(&subdrv->list, &exynos_drm_subdrv_list);
  64
  65         return 0;
  66 }
  67 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_register);
  68
  69 int exynos_drm_subdrv_unregister(struct exynos_drm_subdrv *subdrv)
  70 {
  71         if (!subdrv)
  72                 return -EINVAL;
  73
  74         list_del(&subdrv->list);
  75
  76         return 0;
  77 }
  78 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_unregister);
  79
  80 int exynos_drm_device_subdrv_probe(struct drm_device *dev)
  81 {
  82         struct exynos_drm_subdrv *subdrv, *n;
  83         int err;
  84
  85         if (!dev)
  86                 return -EINVAL;
  87
  88         list_for_each_entry_safe(subdrv, n, &exynos_drm_subdrv_list, list) {
  89                 if (subdrv->probe) {
  90                         subdrv->drm_dev = dev;
  91
  92                         /*
  93                          * this probe callback would be called by sub driver
  94                          * after setting of all resources to this sub driver,
  95                          * such as clock, irq and register map are done.
  96                          */
  97                         err = subdrv->probe(dev, subdrv->dev);
  98                         if (err) {
  99                                 DRM_DEBUG("exynos drm subdrv probe failed.\n");
 100                                 list_del(&subdrv->list);
 101                                 continue;
 102                         }
 103                 }
 104         }
 105
 106         return 0;
 107 }
 108 EXPORT_SYMBOL_GPL(exynos_drm_device_subdrv_probe);
 109
 110 int exynos_drm_device_subdrv_remove(struct drm_device *dev)
 111 {
 112         struct exynos_drm_subdrv *subdrv;
 113
 114         if (!dev) {
 115                 WARN(1, "Unexpected drm device unregister!\n");
 116                 return -EINVAL;
 117         }
 118
 119         list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
 120                 if (subdrv->remove)
 121                         subdrv->remove(dev, subdrv->dev);
 122         }
 123
 124         return 0;
 125 }
 126 EXPORT_SYMBOL_GPL(exynos_drm_device_subdrv_remove);
 127
 128 int exynos_drm_subdrv_open(struct drm_device *dev, struct drm_file *file)
 129 {
 130         struct exynos_drm_subdrv *subdrv;
 131         int ret;
 132
 133         list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
 134                 if (subdrv->open) {
 135                         ret = subdrv->open(dev, subdrv->dev, file);
 136                         if (ret)
 137                                 goto err;
 138                 }
 139         }
 140
 141         return 0;
 142
 143 err:
 144         list_for_each_entry_reverse(subdrv, &subdrv->list, list) {
 145                 if (subdrv->close)
 146                         subdrv->close(dev, subdrv->dev, file);
 147         }
 148         return ret;
 149 }
 150 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_open);
 151
 152 void exynos_drm_subdrv_close(struct drm_device *dev, struct drm_file *file)
 153 {
 154         struct exynos_drm_subdrv *subdrv;
 155
 156         list_for_each_entry(subdrv, &exynos_drm_subdrv_list, list) {
 157                 if (subdrv->close)
 158                         subdrv->close(dev, subdrv->dev, file);
 159         }
 160 }
 161 EXPORT_SYMBOL_GPL(exynos_drm_subdrv_close);